Under the leadership of Sacred Queen Calca, the Roebel Sacred Kingdom enjoyed an era of peace, protected behind their great walls. However, that peace was easily destroyed by the sudden appearance of the Demon Emperor Jaldabaoth and the attack of the Demi-Human Alliance. Though the grandmaster of Roebel Sacred Kingdom’s Sacred Paladin Order, Remedios, and the high priestess, Kelart, gathered their forces to retaliate, they could not overcome the overwhelming difference in Jaldabaoth's power, and their kingdom is now on the verge of collapse. Remedios travels with her order and her subordinate, Neia, to a certain kingdom in hopes of gaining power to counter Jaldabaoth. The name of that kingdom is Sorcerer Kingdom Ainz Ooal Gown. It is a grotesque nation ruled by an undead and despised by those of the Sacred Kingdom—

Source: Kadokawa

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Parent story: Overlord IV